iPhone 6S Plus here, and having the issues of the camera shaking, and also having issues with it focusing on what I need it to focus on (I tap on the object to autofocus, and it never achieves focus, appears blurry). I think it started happening after the latest iOS update.
This issue ruined all my autoshow photos I took yesterday as well, since half of every photo I took seems blurry. Those photos are what prompted me to search up this issue and start to do tests that let me identify the behaviour above. Very disappointed. I'm trying a DFU FW restore right now to see if a complete software reinstall fixes this...